1. Put a few drops of tea juice or water on the back of the tile. After a few minutes, depending on the extent of the water droplets inhaling and spreading, no water absorption or low water absorption rate is good. 2. Listen to the tiles: see if there are broken or rotten bricks on site, and listen to the sound of the bricks. 3. If the color and chroma of the ceramic tile are clear and natural, it means that the degree of porcelain is high, the chroma is not clear, and the degree of porcelain is low. 4. When purchasing, visually observe the surface for pinholes within one meter. If there is, it indicates that the glaze is not completely fused, and it is easy to produce dirt accumulation. 5. Observation of warpage: observe whether the side of the tile is straight with naked eyes. If the warpage is serious, it will affect the firmness of the tile in the future. 6. Check the squareness of the tiles: place the four tiles flat on the ground, change the combination of them at will, and see if the cross and gap in the middle are even, 7. Tap on the tiles to listen to whether the sound is crisp, the crisper the sound, the higher the degree of porcelainization and density, and the better the hardness. 8. Scratch the tiles with sharp objects to see if there are scratches. If there are scratches, it means that the surface hardness is not enough. After the glaze on the surface is polished, the brick surface will be dirty and cannot be cleaned. 9. Check the flatness: put any two bricks facing each other and turn one of them; see if it can turn, if it can turn, it means that the brick surface protrudes uneven. 10. Brightness reflection: Enter the room, turn on all the lights, and see the flatness from the brightness of the product. If the brightness difference of the ground area is large, it means that the surface finish of the bathroom tile is poor. Of course, if you want to further test, you need to use professional equipment. 11. Edge line combination: look at the combination of bathroom tile edge lines. Because the paving is usually spread out from the house to the door, if the quality of the bricks is good and the specifications are the same, then from the inside to the outside, all the gaps in the collage should be the same width. If the inside is narrow and the outside is wide, it is possible that the specifications of the bricks are different. 12. Quality inspection data: The developer is required to provide the quality inspection report or basic data of bathroom tiles, and then search online to see if the standards meet the national standards. Shower Faucet,Bathroom Shower Faucets,Single Handle Shower Faucet,Bath Mixer Taps With Shower AIHUI Sanitary Ware , https://www.aihuisanitary.com